After searching this forum as well as others I haven't come up with a definitive answer to my tach problem. To start I'm talking about the 85 300SD (Federal), there is no tach amp and the problem is that it sometimes works and sometimes has a mind of its own. As of lately the tach has completely stopped working, so my question is where to start looking for the problem and has anyone else found out how to fix this issue?

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OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR, ONLY IN A BENZ

89 560SEC
90 350SDL (Rudolph)
91 350SDL (300SDL drivetrain)
87 BMW 635CSi (Swanhild)
89 BMW M6 (euro)
99 Suzuki Hayabusa (Only the fastest thing ever)

Pass kick panel has the EGR computer which controls your tach.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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